The Chalfont Viaduct

About

The Chalfont Viaduct (also known as the Misbourne Viaduct) is the first of two five-arch brick railway viaducts on the Chiltern Main Line in south-east England. It is located between Gerrards Cross and Denham Golf Club stations. The M25 motorway passes beneath it between junctions 16 and 17 at Gerrards Cross near Chalfont St Peter, from where the bridge gets its name.

The bridge is known as Chalfont No. 1 Viaduct; the longer Chalfont No. 2 Viaduct is a short distance to the west and spans the A413.

The bridge is noted as a local landmark because for ten years it bore a graffiti slogan, "give peas a chance" painted in large white letters on the south-facing parapet. As of March 2024, it bears the slogan "helta▪skelta" (added in 2021).